Q 8. How many chrosomes would you except in the following if the diploid number of chromosomes in an angiospermic plant is 18? 
(i) Endosperm             (ii) Embryo
(iii) Antipodal cell      (iv) Integument and nucellus.

Dear Student,

The diploid number of chromosomes in an angiospermic plant is 18. This means that 
2n =18
n=9

i) Endosperm
Endosperm in angiosperm is triploid,i.e., 3n. Therefore, the number of chromosomes in endosperm are 3n = 3X9 = 18

ii) Embryo
Embryo is haploid (n) in nature. Hence, the number of chromosomes will be 9.

(iii) Antipodal cells
Antipodal cells are haploid cells. Hence, the number of chromosomes in antipodal cells will be 9.  

iv) Integument and nucellus
Both nucellus and integument are diploid (2n) in nature. Therefore, the number of chromosomes will be 18.

Regards